Puzzle time

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Across
  1. 3. large body of matter with no defined shape
  2. 5. path that follows around planets
  3. 7. planet we live on
  4. 8. physical force exerted on or against an object by something in contact with it
Down
  1. 1. a force of attraction between objects that is due to their mass
  2. 2. amount of space
  3. 4. a satellite object that follows the earth
  4. 6. pushed or pulled on an object
  5. 9. move quickly